An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Chapter Seven of the SW-846 Compendium: Introductory and Regulatory Definitions Pertaining to Hazardous Waste Characteristics

This chapter addresses procedures for required "method-defined parameters" (MDPs), where the analytical result is wholly dependent on the process used to make the measurement. Examples include the use of the toxicity characteristic leaching procedure (TCLP) to prepare a leachate, and the flash point, pH, paint filter liquids, and corrosivity tests. 

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.